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Borderlands 4

Fault Hunting Walkthrough

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★ 6 SHiFT Codes as of September 2025
☆ Black Market Location
★ Elemental Weakness Chart
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★ Builds: Vex | Amon | Rafa | Harlowe
☆ How to Respec Skill Tree

Borderlands 4 - Fault Hunting

This is a walkthrough for the Fault Hunting side mission in Borderlands 4. Read on to follow the objectives and clear the mission.

List of Contents

How to Unlock Fault Hunting

There are two ways to start the Fault Hunting side mission, though both ways are still fixed to the Ruined Sumplands area and follow the same progression.

Both ways require you to have initiated the Wrath of the Ripper Queen main questline.

Talk to Leopold at the Society for Amateur Seismology Enthusiasts

Borderlands 4 - Fault Hunting Side Mission Location 1

You may start Fault Hunting by directly talking to Leopold at the Society for Amateur Seismology Enthusiasts on the western side of the Ruined Sumplands.

Accept Mission at Carcadia

Borderlands 4 - Fault Hunting Side Mission Location 2

The second way of starting Fault Hunting is after restoring Carcadia in the first part of the Unpaid Tab main mission.

Talk to Leopold at an intercom to accept the mission. You will have to talk directly to Leopold anyway at the Society for Amateur Seismology Enthusiasts.

Fault Hunting Walkthrough

Find the Source of the Tremor

# Walkthrough
1 Talk to Leopold at the Society for Amateur Seismology Enthusiasts.
2
Borderlands 4 - Cave Geyser
Travel northeast to reach the tremor site. Inside the cave, glide toward the geyser to get a boost and land on the other side.
3
Borderlands 4 - Cave Door
Keep going until you reach a locked door. Kill the creeps.

Optionally, you may search the area by picking up the blue item near the door and examining the door itself.
4
Borderlands 4 - Geyser to Upper Cave
With the door still locked, look around for a geyser and jump toward it to land on an upper portion of the cave. Crouch past a tight passage and drop down into the next area.

Explore the Facility

# Walkthrough
1
Borderlands 4 - Shoot Fuse
Ahead, you will be blocked by a door that keeps opening and closing. Through the gap in the door, shoot the green fuse. Move along and fight creeps before dropping down another hole.
2
Borderlands 4 - Facility Server Room
At the server room, find the server console.

You may optionally search the room by examining the mummified creeps on the floor.
3 Find the power source slightly to the right of the console.
4
Borderlands 4 - Facility Puzzle Pt 1
Borderlands 4 - Facility Puzzle Pt 2
Direct power to the server console by using the grappling hook to turn the wires on the ceiling. Then, hack the server console.
5 While ECHO-4 is hacking the console, defend it by killing the creeps advancing toward it.

Confront Genone

# Walkthrough
1 Leave the server room by going through the door to the right of the power source. Following the path will lead you back to the entrance of the cave.
2
Borderlands 4 - To Lopside
Go to Lopside, south of Carcadia Burn. You may immediately go there if the Makeshift Chalet Safehouse has already been captured.
3
Borderlands 4 - Genone Cave
Arriving at The Yawning Yard, go to the edge of a cliff and glide down to find a door, which will open for you.
4
Borderlands 4 - Fight Synth Prototypes
Kill creeps on the way to Genone. Eventually, you will find yourself in a room with synth prototypes. After killing them all, activate the console by a door.
5
Borderlands 4 - Genone Door Puzzle 1
Borderlands 4 - Genone Door Puzzle 2
Borderlands 4 - Genone Door Puzzle 3
Like in the server room, direct power to the door to unlock it.
6
Borderlands 4 - Genone Boss
After passing through a series of rooms, confront the boss Genone.
7
Borderlands 4 - Control Room Keycard
Find the control room keycard on a terminal at the center of the arena. Use the keycard to gain access to the control room. Inside, turn the switch to delete Zadra's research and end the mission.

Fault Hunting Rewards

Side Mission Rewards
Base Reward ・Cash
・XP
・Eridium
Equipment Reward ・Assault Rifle (Green to Purple Rarity)
Cosmetic Reward ・Weapon Skin (Eternal Defender)

Borderlands 4 Related Guides

Borderlands 4 List of Side Missions Partial

List of Side Missions

List of Side Missions

Meat is Murder No Place Like Home Abduction Injunction
Ready to Blow Hangover Helper Electroshock Therapy
Breeding Daisies Sum of His Parts Savage Salvage
Whack-A-Thresher Never Meet Your Heroes Electroshock Therapy: The Second Session
Finway's Cup Carried Away Vend of the Line
Droning On Drone Ranger PowerDrop
The Kairos Job TASK Master Null and Void
Scoundrel Roundup: Kilo Scoundrel Roundup: Glitch Flat Kairoser
Fault Hunting All Charged Up Gone Are My Leggies
Working for Tips Mob Mentality The Importance of Being Furnished
Mob Rules Potty Mouth To the Limb It
To the Limb It: Redux To the Limb It: Couples Therapy Angry Mob
Mob Justice Exit Through the Rift Shop One Gassy Issue
Wayward Gun A Call for Help It's a Whole Phase Situation
A Brother in Need - -

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